Case in point, this morning I interviewed a 'senior' C# .NET developer with over 10 years' experience - and yet she didn't even know the syntax for using lambda expressions, was barely able to get started with linq, and was unable to tackle a basic string splitting problem. Oh, and she couldn't do fizz-buzz.
I was interviewing for a position in India; I just use such basic tests as a filter, so I can quickly weed out the wrong kind of candidate. See my other comment here for more: https://news.ycombinator.com/item?id=13327100
If I see a technical candidate resume that has a long stretch (5+ years) at the same company and that company isn't primarily a technical one, huge red flags go up because the previously mentioned 'Senior' candidate is who generally come out of these situations. IF I get past their resume they're going to spend a lot more time telling me how they stay up to date with the world than a candidate otherwise would.
If I see a technical candidate resume that has a long stretch (5+ years)
at the same company and that company isn't primarily a technical one,
huge red flags go up
I do extremely basic programming tasks (no more difficult than fizz-buzz) to quickly weed out that sort of candidate.